Extruding machine



Oct. 3. 1933. E. H. R. BARTCJN 1,929,395

vEX'IRUDING MACHINE Filed April 14. 1931 Patented Oct.'3, 1933 EXTRUDING MACHINE Edward H. R. Barton, Englewood, N. .1., assignor of one-half to Andrew M, Fairlie, Atlanta,

Application April14,.1931. scram. 530,037 T .6Clai ms. (o1. 25-'14,)

My invention relates to improvements in ma chines for making clay units for use as filling material for counter-current mixing or reaction: spaces, by the extrusion method. It relates .spe-.

cifically to improvements in the machine invent ed by me andgcovered'by Patent No; 1,604,799 granted to me on October 26, .1926. Whenthis machine was put into operation, it was realized 1 that it would be desirable to be able to varyth'e long enough to support the screwyl, ,The shaft,

. 6, is supported in two bearings, '7 'and8. A pulley, 10, is mounted, on the shaft, 6, by meansof which the screw, 4, is driven. V Beyond the end of the screw, 4', and the shaft, 6, the body, or clay containing chamber, is bent, or curved, so that it has an offset, asshown' in the drawing, the'longitudinal axis of said offset being at an angle of from 1 5 to not more than 90 degrees to the main longitudinal axis of the machine. Positioned in this offset, and lying sub- .l stantially along the longitudinal axis thereof, is a second shaft, 25, which is mounted in a bearing, 24, in the body, 2, of the machine. This shaft, 25, is set at an angle with the main longitudinal axis of the machine so that one I end protrudes through the side of the machine. The end which so protrudes is equipped with a pulley, 26, for driving the shaft, 25. At the end of the shaft, 25, opposite to the pulley, 26, is mounted a rotatable slotted core of the die, 11. The rotatable core and the stationary parts of the die as shown in the annexed drawing are constructed exactly as in my original machine.

The operation of the improved machine is similar to the operation of my original machine except that in the improved machine, the rotatable core, 11, being mounted on shaft'25, is rotated by pulley 26 instead of rotating on the same shaft as screw 4. It is therefore possible torrotate the core, 11, at a different speed from thatof the screw, 4 thus affording a means of varying the pitch of the spiral vane in the clay product. If

pitch of the twisted partition in the'fillingfunits shows a sectional plan with the upper part of the V the housing "and supports, in "a straight line ma;

the machine-were operated by driving pulley 10 and causing screw4 to force clay through} the die, while the hollow core, l1, was not rotated at all, a perfectly straight partition would be formed in the filling units'produced. If thecore, 11, were rotated slowly, the partition or'vane would have a steep pitch,-and-as the speed of rotation of the core,'11, was increased thepit'ch of the twisted partition would'bereduced, through a very wide range." I .call attention to the fact that this invention avoids the disadvantages inherent in the hitherto known devices of this character, in which a rotatable core" is driven by different mechanism, or at a different speed from that i employed for the claypropelling means. The principal disadvantages of, such previously lmown devices are, variously: h V 1. The core-shaft isinaccessible for repairs without much labor for'dismantling other parts of the machine.

2. The core-shaft; either within another (hollow) shaft or enclosed in separatehousing, is liable, if it becomes bent or strained, to jam or stick. j r l" 3." Where the coreeshaft is operated by gearand 80 pinion or similar mechanism; such mechanism must be housed and supportedpwhih j 1(a) Adds-to the expense of the installation? 1 (b) Adds to themaintenanceexpense, because chine must lie in the direct path of the clay, the siliceous constituents of which rapidly abrade and destroy housing and supports.

(c) Increases the power costs, for the housing and supports increases the frictional resistance to clay-flow. 1

By means of my offset in the body of myma chine, I am able to install a core-shaft (operatable independently of the clay-propelling shaft) which is at once simple, inexpensive to install and to maintain, requires no housing, is free from complicated mechanism, and interposes a minimum of resistance to clay-flow. a r

The method of bringing out the shaft, 25, through the wall of the machine, or the method of driving shaft 25, so as to be able to drive it inde-.. pendently of the shaft, 6, is subject to infinite variations as by changing the shape of the body, 2, of the machine, or by. means of gears, or sprocket and chain, or by other well known mechanical means, and -I do not desire to be limited to theexact body shape or the method of driving shown; but.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. In an extruding machine for making plastic products, the combination, near the outlet orifice of such machine, of a fixed die for shaping the exterior surfaces of such products, with a rotatable slotted core positioned within the bore of said die, a chamber for containing the plastic material to be extruded, means for forcing said plastic material partly around and partly through said slotted "core and through said die, said slotted core being attached to a shaft disposed at an angle to the main longitudinal axis of said machine and passing through the wall of said machine, for the rotation of said core independently of .the means employed for propelling said plastic material.

2. In an extruding machine'for making plastic products, the combination of a fixed hollow die for shaping the exterior surfaces of said products with a rotatable slotted core positioned at least partially Within the perimeter of said die, a chamher for containing the plastic material to be extruded, means for propelling said plastic materialalong the surfaces of said core and through the slot thereof and through the orifice of said die, said rotatable core being carried by a shaft disposed at an angle to the .main longtiudinal axisof said machine, and passing through the wall of said machine, and operatable by driving mechanism at a speed independent of the speed of the means employed for propelling said plastic material. 7 4 a I 3.- In an extruding machine for plastic material, the combination of'a fixed hollow die .for shaping the exterior surfaces of plastic products with a rotatable core having a slot extending at least partially across its width for shaping av spiral vane and the interior surfaces of the Walls inside of said plastic products, said core being positioned at least partially within the perimeter of said die and being carried by a rotatable shaft disposed at an angle to the main longitudinal axis of said machine and passing through the wall of said machine,.,and means, carried by-another rotatable shaft, disposed substantially along. the longitudinalaxis of said machine, and so positioned as to avoid contact with or interference with said core-shaft, for propelling said plastic material aroundsaid core and through the slot or slots thereof and through the orifice of said die, and driving mechanism for rotatingfsaid two at different speeds. f r

4. In an extruding machine for plastic material, a fixed hollow die for shaping the exterior surfaces of plastic products, in combination with a rotatable slotted core positioned with reference to said'die for shaping the interior Wall-surfaces and a spiral vane within said plastic products, means for propelling said plastic material around and beyond said core and through the slot or slots thereof and through the orifice of said die, said core being attached to a shaft disposed at an angle to the main longitudinal axis of said machine and passing through thewall of said machine, the bearing supporting said shaft being positioned out of the direct path of said plastic material in its movement towards the die orifice. 1

5. An extrusion machine for plastic materials, comprising a chamber for containing, mixing and propelling. said plastic material, said chamber, relatively near its outlet extremity, being bent or curved to form an offset, so as to change the directionof travel for, said plastic material by from 15 to not more than degrees, substantially as herein described and shown, and a shaft passing through the wall of said chamber and disposed substantially along the longitudinal axis of said offset, and terminating near the outlet extremity of said chamber in a rotatable core adapted to shape the spiral vanev and interior wall-surfaces of plastic products. v

'6. An extrusion machine for plastic materials comprising a chamber for containing, mixing and propelling said plastic materials, said chamber being equipped'relatively' near its inlet end, with means, carried by a rotatable :shaft positioned substantially along the longitudinal axis of said inlet end, for propelling said plastic material, said chamber -having,'relatively'near its outlet end, an offset ,with longitudinal axis at an angle of from 15 'to not more than 90 degrees to the longitudinal axis 'of the inlet end of said chamber, said offset being equipped with a second rotatable shaft suported by a bearing EDWARD: R. BARTON. 

